Ubuntu 10.04 LTS P2V boot error no such disk

Hello,

I've done a P2V conversion of my Ubuntu Server 10.04 LTS with VMware vCenter Converter 6, to my ESXi 5.5.

The job works perfectly in the software, completed without any error message...

The problem is now when I boot the freshly created VM, I have the following error message on the prompt :

Have you any idea about how to resolve this ?

I've tried to reinstall grub with a boot repair disk but it doesn't work

Thanks for you help.